Glass composition for producing high strength and high modulus fibers

a glass composition and high modulus technology, applied in the field of high-performance glass compositions, can solve the problems of glass being very fluid and very corroding to conventional refractories, and achieve the effects of low density, high strength and reduced manufacturing costs of glass fibers produced by inventive compositions

Pending Publication Date: 2013-08-29
OCV INTELLECTUAL CAPITAL LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]In another embodiment of the present invention, a continuous glass fiber formed of the composition described above is produced using a refractory tank melter. By utilizing a refractory tank formed of refractory blocks, manufacturing costs a...

Problems solved by technology

The melting temperature of S2-glass is too high for common refractory materials and the ΔT is very small (or negative), thus ca...

Method used

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Examples

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example 1

High Performance Glass Compositions

[0044]Glass compositions according to the present invention are made by mixing reagent grade chemicals in proportioned amounts to achieve a final glass composition with the oxide weight percentages set forth in Tables 6 and 7. The raw materials are incited in a platinum crucible in an electrically heated furnace at a temperature of 1650° C. for 3 hours. The forming viscosity (i.e., the temperature that corresponds to a viscosity of about 1000 Poise) was measured using a rotating cylinder method (ASTM C965-96 (2007)). The liquidus temperature was measured by exposing glass to a temperature gradient in a platinum-alloy boat for 16 hours (ASTM C829-81 (2005)). Density was measured by the Archimedes method (ASTM C693-93 (2008)). To make glass fibers for testing modulus and strength, cullet from a glass composition was added to an electrically resistance bushing and pulled from a single tip at the bottom of the bushing. The fibers were wound onto a rota...

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PUM

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Abstract

A glass composition including Si02 in an amount from about 70.6 to about 79.6% by weight, AI2O3 in an amount from about 10.0 to 18.5% by weight, MgO m an amount from about 10.0 to about 19.0% by weight, CaO in an amount from about 0.1 to about 5.0% by weight, Li20 in an amount from 0.0 to about 3.0% by weight, and Na20 in an amount from 0.0 to about 3.0% by weight is provided. In exemplary embodiments, the glass composition is free or substantially free of B2O3 and fluorine. The glass fibers have a specific modulus between about 3.40×107 J/kg and 3.6×107 J/kg. Glass fibers formed from the inventive composition possess exceptionally an exceptionally high modulus and a low density, which make them particularly suitable in applications that require high strength, high stiffness, and low weight, such as wind blades and aerospace structures.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority and all other benefits of U.S. Provisional Application Ser. No. 61 / 394,177.TECHNICAL FIELD AND INDUSTRIAL APPLICABILITY[0002]The present invention relates generally to a glass composition, and more particularly, to a high performance glass composition that possesses acceptable forming properties and whose components are melted in a refractory melter. Glass fibers formed from the inventive composition possess an improved modulus and a low density and may be used to reinforce composite matrices where high strength, stiffness, and light weight are desired.BACKGROUND OF THE INVENTION[0003]Glass fibers are manufactured from various raw materials combined in specific proportions to yield a desired chemical composition. This collection of materials is commonly termed a “glass batch.” To form glass fibers, typically the glass batch is melted in a melter or melting apparatus, the molten glass is drawn into filaments...

Claims

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Application Information

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IPC IPC(8): C03C3/087C03C13/00C03B37/02
CPCC03C3/087C03C13/06C08J5/08C03C13/00C08J2300/24C03B37/02C08J2300/22Y10T442/2992
Inventor MCGINNIS, PETER BERNARDHOFMANN, DOUGLAS ALAN
Owner OCV INTELLECTUAL CAPITAL LLC
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